Remove the private option from include_role

The private option on include role was never implemented and
will no longer be developed. This change removes the option
so ansible no longer raises a deprecation warning.

Change-Id: I011fba2674dc4c6888ba93c0ea90f4d60e4b7657
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

tasks/glance_install.yml

@@ -107,7 +107,6 @@
 - name: Run the systemd service role
   include_role:
     name: systemd_service
-    private: true
   vars:
     systemd_user_name: "{{ glance_system_user_name }}"
     systemd_group_name: "{{ glance_system_group_name }}"

tasks/glance_install_source.yml

@@ -37,7 +37,6 @@
 - name: Install the python venv
   include_role:
     name: "python_venv_build"
-    private: yes
   vars:
     venv_build_distro_package_list: "{{ glance_devel_distro_packages }}"
     venv_install_destination_path: "{{ glance_bin | dirname }}"

tasks/glance_post_install.yml

@@ -81,7 +81,6 @@
 - name: Run the systemd mount role
   include_role:
     name: systemd_mount
-    private: true
   vars:
     systemd_mounts:
       - config_overrides: "{{ mount_var.config_overrides | default({}) }}"